Currently I am stress testing a web-application using Jboss 3.2.3 production release , oracle 9i, entity bean transaction policy = instance per transaction, with Jrockit 1.4.2_05 , with jboss running as a "nt" service under Win2000sp4 using javaservicewrapper 3.0.5 .

Currently the load on the system is 30 users (30 connections , tx in fact). Regularly i receive the below exception. The org.jboss.resource.connectionmanager throws the exception "unable to commit" after invoking on a stateless session bean.

Can it be that the org.jboss.resource.connectionmanager loses pedales under heavy load?